Aqueous composition and aqueous coating agent

Abstract

An aqueous composition containing, based on the total weight of the composition, a. 3 to 25 wt.% binder, b. 5 to 25 wt.% crosslinking polymer, c. 0.5 to 10 wt.% particles with a mean particle size of 1 to 20 µm, d. 0.01 to 2 wt.% an alkaline component, e. 30 to 70 wt.% water, is presented and described. A manufacturing process for the aqueous composition, a kit-of-parts comprising the aqueous composition and a hardener, and an aqueous coating agent are also presented and described.

Description

[0001] The present invention relates to an aqueous composition, a method for producing the aqueous composition, a kit-of-parts comprising the composition and a further agent capable of forming an active ester with carboxyl groups, an aqueous coating agent comprising the aqueous composition and the agent capable of forming an active ester with carboxyl groups, and the use of the aqueous coating agent as a varnish.

[0002] Particularly in the automotive sector, a trend towards so-called soft-feel coatings has been observed for some time. These coatings create a unique tactile sensation (haptic quality) that can be described as velvety, soft, rubbery, or warm, and is perceived as pleasant. Furthermore, these soft-feel coatings give the surface a matte appearance that is considered appealing.

[0003] In the automotive sector, such coatings can be applied using specialized machines and processes, such as in special coating systems that operate at elevated temperatures and / or reduced pressure. Therefore, many materials and material combinations can be used that, for example, cannot be used in interior and / or exterior paints because they are difficult to apply or dry poorly.

[0004] Paints, especially matte paints, often suffer from the problem that they cannot be offered to the end consumer as one-component (1K) systems. Instead, they are usually offered to the user as two-component (2K) systems, typically consisting of a base paint and a hardener, which the user must mix immediately before application. This has several disadvantages. Firstly, dosing errors can easily occur, resulting in the paint not curing completely or excess hardener undergoing undesirable side reactions. Furthermore, the curing window is short, so the user must apply the mixed paint quickly. Due to this short time window, the user must also know the exact amount of paint required to minimize unusable excess.Finally, the hardeners are reactive substances that are often harmful to health, so users of 2K paint systems have to deal with these harmful substances.

[0005] One-component (1K) coatings are well-known, but their curing often relies solely on physical drying. No chemical cross-linking occurs during the curing process. The disadvantage of this is the lower mechanical and / or chemical resistance of these coatings.

[0006] Paints as 1K systems, in which chemical cross-linking occurs during curing, are also known. In these systems, the base paint is typically mixed with a hardener that has been previously reacted with a blocking agent. However, to achieve the curing of these systems, the hardener must first be activated by heating, which represents an additional step, may release undesirable substances, and is not always feasible.

[0007] The object of the invention is to provide an aqueous composition that can be part of a kit-of-parts. A further object of the invention is to provide a kit-of-parts that has a long shelf life and / or from whose components an aqueous coating material can be easily obtained.

[0008] A further object of the invention is to provide an aqueous coating agent that can be used as a paint, particularly indoors and / or outdoors.

[0009] A further object of the invention is to provide an aqueous coating material that users can use as a paint as a 1K system. It is particularly desirable if no additional step, especially no activation step by the user such as a heating step, is required before applying the paint.

[0010] Another object of the invention is to provide an aqueous coating material that users can apply as a paint as a 1K system which has a long time window for application and / or in which the user does not have to handle any harmful substances.

[0011] Another object of the invention is to provide an aqueous coating agent, in particular as a varnish, which exhibits a soft-feel effect, particularly with regard to the feel and / or the optical impression, and / or has good mechanical and / or chemical resistance and / or shows good adhesion to surfaces on which varnishes are usually applied.

[0012] All or some of these problems are solved by the aqueous composition specified in points 1 and 17, the method specified in point 14, the kit-of-parts specified in point 18, the aqueous coating material specified in point 20, and the use specified in point 23.

[0013] Advantageous configurations are indicated in the dependent points and are explained in detail below.

[0014] The invention accordingly provides an aqueous coating material that can be used as a paint, in particular as a one-component (1K) system. The aqueous coating material according to the invention can, in particular, have a long application window. Nevertheless, a long shelf life is desirable for such coating materials. For this purpose, the invention provides a kit-of-parts comprising an aqueous composition and a hardener. These two components can be stored in separate containers, thus enabling a long shelf life. Furthermore, the aqueous coating material according to the invention can be easily obtained by mixing the aqueous composition with the hardener. Accordingly, the invention also provides an aqueous composition that can be a component of the kit-of-parts according to the invention.Since the hardener of the kit-of-parts is only required in small quantities in the aqueous coating material according to the invention, the quantities of the other components of the aqueous composition according to the invention and of the aqueous coating material according to the invention can overlap at least partially. The aqueous composition according to the invention will first be described in more detail below, followed by the method for producing the aqueous composition according to the invention, the kit-of-parts according to the invention, and the aqueous coating material according to the invention.

[0015] The aqueous composition according to the invention contains, in each case based on the total weight of the composition, a. 3 to 25 wt.% binder, b. 5 to 25 wt.% crosslinking polymer, c. 0.5 to 10 wt.% particles with an average particle size of 1 to 20 µm, d. 0.01 to 2 wt.% of an alkaline component, e. 30 to 70 wt.% water.

[0016] Surprisingly, it was found that the combination of 3 to 25 wt% of a binder with 5 to 25 wt% of a crosslinking polymer, 0.5 to 10 wt% of particles with an average particle size of 1 to 20 µm, and 0.01 to 2 wt% of an alkaline component in 30 to 70 wt% water yields an aqueous composition well-suited for a kit-of-parts with a hardener as an additional component. Adding the hardener to the aqueous composition results in an aqueous coating that exhibits a pleasant soft-touch feel, can be used as a paint indoors and / or outdoors, shows good adhesion to various surfaces, has a long application time, offers good resistance to mechanical and / or chemical influences, and / or requires the user to handle no hazardous substances.Despite the long application window, it was still possible to obtain aqueous coatings, especially varnishes, that hardened quickly after being applied to a surface.

[0017] Without wishing to be bound to a scientific theory, the addition of the alkaline precipitate to the aqueous composition according to the invention appears to ensure that, after mixing the aqueous composition with the hardener, the hardener is stabilized in the aqueous coating material according to the invention. Furthermore, the evaporation of at least some of the components from the aqueous coating material according to the invention after application appears to ensure that the aqueous coating material cures well. Additionally, chemical crosslinking reactions appear to occur during curing due to the hardener, leading to good mechanical and / or chemical resistance of the coating. Finally, to produce the aqueous coating material, it may be sufficient to mix the two components of the kit-of-parts without the need to add any further components.

[0018] The mean particle size, particularly of particles with a size of 1 to 20 µm, can be defined in particular as the D50 value. The D50 value can, in particular, denote the size at which 50%, e.g., 50 wt%, of the particles are smaller than the specified size. For example, 50%, e.g., 50 wt%, of the particles would then pass a theoretical sieve size. Methods for determining the mean particle size, in particular the D50 value, are known to those skilled in the art. The mean particle size, in particular the D50 value, can be determined, for example, by creating a particle size distribution. The measurement can be carried out, for example, by light scattering, in particular by laser diffractometry or photon correlation spectroscopy. In particular, the mean particle size, in particular the D50 value, can be measured in a liquid medium, for example, an aqueous medium.The measurement can be carried out in particular according to ISO 13321, especially ISO 13321:1996, and / or ISO 22412, especially ISO 22412:2008. For example, a Malvern Mastersizer 2000 or 3000 can be used to determine the mean particle size, especially the D50 value. Other methods for determining the mean particle size, especially the D50 value, include light and / or laser diffraction. Preferably, a Malvern Mastersizer 3000 is used to determine the particle size distribution. Advantageously, the procedure according to ISO 13320, especially ISO 13320:2009, can be followed. Furthermore, the mean particle size, especially the D50 value, can be determined using an ultracentrifuge or chromatographic methods, for example, capillary hydrodynamic fractionation (CHDF).

[0019] The aqueous composition contains 3 to 25 wt.%, preferably 5 to 20 wt.%, more preferably 8 to 15 wt.%, particularly preferably 10 to 13 wt.%, binder, in each case based on the total weight of the composition.

[0020] The specifications regarding the binder content in the aqueous composition refer to the binder as a solid fraction. However, in the production of an aqueous composition, the binder is preferably added in the form of a dispersion, particularly an aqueous dispersion. Advantageously, these binder dispersions, especially the aqueous binder dispersions, contain 25 to 60 wt.%, preferably 30 to 50 wt.%, and more preferably 35 to 40 wt.%, of binder as a solid fraction. Accordingly, the binder in the aqueous composition according to the invention can be in the form of an aqueous dispersion with a solid fraction of 25 to 60 wt.%, particularly 30 to 50 wt.% or 35 to 40 wt.%. If the binder is added as an aqueous binder dispersion, the water in the binder dispersion is considered part of the total water content of the aqueous composition.If the binder is present, for example, as a 50% dispersion in water, the aqueous composition contains 6 to 50 wt% of the binder dispersion and correspondingly less water, in particular 27 to 45 wt% water, in each case based on the total weight of the aqueous composition. Aqueous compositions containing binder in these amounts have shown good processing properties, especially good miscibility.

[0021] A single binder or several binders can be used. If several binders are used, they can be added as solids or as binder dispersions. If added as binder dispersions, they can have the same or different solids content. Preferably, the binder of the aqueous composition according to the invention is a mixture of two aqueous binder dispersions, each with a solids content of 25 to 60 wt.%, in particular 30 to 50 wt.% or 35 to 40 wt.%. The aqueous binder dispersions can have the same or different, preferably different, solids content. Preferably, one of the binder dispersions has a solids content of 35 wt.% and the other a solids content of 40 wt.%.Preferably, the two binder dispersions are used in a weight ratio (binder dispersion with a solids content of 35 wt.%) to (binder dispersion with a solids content of 40 wt.%) of 1.3 to 1.9, in particular 1.4 to 1.8 or 1.5 to 1.7.

[0022] Advantageously, the binder in the aqueous composition according to the invention is a polymer. The polymer can be a homopolymer or a copolymer, with various architectures being conceivable for copolymers, such as statistical copolymers, gradient copolymers, alternating copolymers, block or segment copolymers, and graft copolymers. In particular, the polymer is selected from the group consisting of polyurethanes, polyester polyurethanes, anionic polyester polyurethanes, aliphatic anionic polyester polyurethanes, polycarbonate ester polyurethanes, polyether polyols, polyacrylate dispersions, alkyd emulsions, as well as their hydroxy-functional polymers and mixtures thereof. Mixtures of the aforementioned polymers can be achieved, in particular, by using more than one, and especially two, binder dispersions with different polymers.Particularly preferred as binders are an aqueous polyurethane dispersion, especially with a solids content of 35 wt.%, and an aqueous anionic polyester polyurethane dispersion, especially with a solids content of 40 wt.%. It has been found that aqueous coatings containing such binders exhibit good adhesion to various surfaces, especially metal, wood, plastics, existing coatings, and suitable primers. Furthermore, coatings containing such binders have a pleasant feel.

[0023] The aqueous composition further contains 5 to 25 wt.%, preferably 8 to 22 wt.%, more preferably 10 to 20 wt.%, and particularly preferably 13 to 17 wt.%, crosslinking polymer, in each case based on the total weight of the composition. Such amounts of the crosslinking polymer have proven advantageous for good crosslinking of the aqueous coating material and thus for good resistance of the dried coating.

[0024] The crosslinking polymer has the particular function of providing at least one functional group with which the hardener of the aqueous coating material, which is preferably stored separately in the kit-of-parts, undergoes a chemical reaction, thus effecting chemical crosslinking. Preferably, the at least one functional group of the crosslinking polymer is selected such that no chemical crosslinking occurs in the aqueous composition that does not contain the hardener of the aqueous coating material.

[0025] Advantageously, the crosslinking polymer has at least one carboxyl group and / or at least one hydroxyl group and / or at least one amino group, preferably at least one carboxyl group. Furthermore, the crosslinking polymer advantageously has an acid value of 1 to 20 mg KOH / g. The acid value can be calculated specifically for the delivery form of the crosslinking polymer. The acid value can be determined specifically according to DIN EN ISO 2114, particularly according to DIN EN ISO 2114:2002-06.The crosslinking polymer is preferably selected from the group consisting of anionic polyurethanes, aliphatic anionic polyurethanes, acrylic acid-containing polymers, polyurethane-acrylate emulsions, polyurethane-alkyd emulsions, polyurethanes, polyester polyurethanes, anionic polyester polyurethanes, aliphatic anionic polyester polyurethanes, polycarbonate ester polyurethanes, polyether polyols, polyacrylate dispersions, alkyd emulsions, as well as their hydroxy-functional polymers and mixtures thereof. An aliphatic anionic polyurethane is particularly preferred as the crosslinking polymer.

[0026] The information regarding the content of crosslinking polymer in the aqueous composition refers to the crosslinking polymer as a solid fraction. Preferably, however, the crosslinking polymer is added in the form of a dispersion, particularly an aqueous dispersion. Advantageously, these crosslinking polymer dispersions, especially the aqueous crosslinking polymer dispersions, contain 25 to 60 wt.%, preferably 30 to 50 wt.%, and more preferably 35 to 45 wt.% or 40 wt.%, of crosslinking polymer as a solid fraction. Accordingly, the crosslinking polymer of the aqueous composition according to the invention can be present in the form of an aqueous dispersion with a solid fraction of 25 to 60 wt.%, particularly 30 to 50 wt.%, 35 to 45 wt.%, or 40 wt.%.When the crosslinking polymer is added as an aqueous crosslinking polymer dispersion, the water in the dispersion is included in the total water content of the aqueous composition. For example, if the crosslinking polymer is present as a 50% dispersion in water, the aqueous composition contains 10 to 50 wt.% of the binder dispersion and correspondingly less water, in particular 25 to 45 wt.% water, based on the total weight of the aqueous composition. Aqueous compositions containing crosslinking polymer in these amounts have demonstrated good processing properties, especially good miscibility.

[0027] The aqueous composition further contains 0.5 to 10 wt.%, preferably 1 to 8 wt.%, more preferably 2 to 7 wt.% or 3 to 6 wt.%, particles with an average particle size of 1 to 20 µm, in each case based on the total weight of the composition.

[0028] Preferably, the particles with a mean particle size of 1 to 20 µm have a mean particle size of 2 to 17 µm, more preferably 3 to 15 µm, and particularly preferably 4 to 13 µm or 6 to 10 µm. The above applies to the mean particle size and its determination. Advantageously, the particles with the aforementioned sizes are selected from the group consisting of polyurethane particles, polymethyl methacrylate particles, polymethyl urea particles, silicate acrylic resin polymer particles, polymeric microspheres, cellulose fibers, textile fibers, cork flour, and mixtures thereof. Silicate acrylic resin polymer particles are particularly preferred. Such particles integrate well into the aqueous composition and the aqueous coating material and exhibit little segregation even in the dry film.

[0029] The aqueous composition further contains 0.01 to 2 wt.%, preferably 0.01 to 1 wt.%, and more preferably 0.01 to 0.05 wt.%, of an alkaline component, in each case based on the total weight of the composition. Advantageously, the alkaline component is selected from the group consisting of potassium hydroxide, sodium hydroxide, calcium hydroxide, ammonia, triethylamine, dimethylaminoethanol, aminomethylpropanol, dimethylglucamine, and mixtures thereof. Preferably, the alkaline component in its pure state is a water-soluble gas, in particular ammonia. Preferably, the alkaline component is present in the form of an aqueous solution. More preferably, the alkaline component is present as ammonia solution. If the alkaline component is present as an aqueous solution, in particular as ammonia solution, the aqueous composition preferably contains 0.01 to 2 wt.%, and more preferably 0.01 to 1 wt.%, of the alkaline component.The same principles apply to the water content of the aqueous composition as described above for binder and crosslinking polymer dispersions. It has been found that the aforementioned alkaline components in the aqueous coating agent provide good stabilization of the agent, which is capable of forming an active ester with carboxyl groups. Nevertheless, these alkaline components, particularly ammonia, especially in the form of ammonium chloride, enable rapid curing after application of the aqueous coating agent.

[0030] Aqueous compositions according to the invention, containing a combination of the aforementioned components, possess advantageous properties. In particular, aqueous compositions according to the invention can be included in kit-of-parts together with a hardener as a further component. These components can be easily mixed to produce aqueous coating materials according to the invention, which can be supplied to users as one-component (1K) paints with a curing time of up to two months in the container. Coatings produced with such paints have a pleasant feel. Furthermore, they adhere very well to various substrates and / or are very suitable for use as paints in interior and / or exterior applications. Such paints also exhibit good resistance after curing.These effects were achieved in particular with aqueous compositions in which the binder was in the form of two binder dispersions, in particular an aqueous polyurethane dispersion and an anionic aliphatic polyester polyurethane dispersion, the crosslinking polymer was in the form of an aqueous aliphatic anionic polyurethane dispersion, the particles had a mean particle size of 6 to 10 µm and were in particular silicate acrylic resin polymer particles, and the alkaline component in its pure state was a water-soluble gas, in particular the alkaline component was in the form of ammonia solution.

[0031] Advantageously, the aqueous composition according to the invention can additionally contain 0.1 to 5 wt.%, in particular 0.1 to 3 wt.% or 0.5 to 1.5 wt.%, a matting agent, in each case based on the total weight of the composition. The inclusion of a matting agent helps, in particular, to create the desired visual appearance of the hardened lacquer. The matting agent can also help to create the desired feel of the hardened lacquer.

[0032] Mattifying agents are additives for coating materials, especially paints, which affect the surface of the coating in such a way that its gloss level, especially the reflectometer value, decreases.

[0033] Various substances can be used as matting agents. Preferably, the matting agent is selected from the group consisting of silica, fumed silica, polymethyl urea, ceramic microspheres, diatomaceous earth, quartz flour, talc, and wax additives such as polyethylene waxes. Silica is preferably used as the matting agent. These matting agents have proven suitable for producing the effects described above.

[0034] Preferably, the particles of the matting agent have an average particle size, in particular a D50 value, of 1 to 20 µm, more preferably of 5 to 15 µm, more preferably of 7 to 13 µm, more preferably of 8 to 12 µm, and most preferably of 9 to 11 µm. The above applies to the average particle size, in particular the D50 value, of the matting agent and its determination.

[0035] Furthermore, the aqueous composition according to the invention can advantageously contain additional particles. In particular, the aqueous composition can additionally contain 0.1 to 5 wt.%, preferably 0.1 to 3 wt.%, more preferably 0.5 to 2 wt.%, in each case based on the total weight of the composition, particles with a size of 1 to 50 µm, preferably 1 to 40 µm, more preferably 1 to 30 µm, more preferably 1 to 20 µm, more preferably 1 to 15 µm, more preferably 1 to 10 µm, and particularly preferably 6 µm. The size of these particles is in particular the D90 value. The D90 value can in particular denote the size at which 90%, e.g., 90 wt.%, are smaller than the specified size. For example, 90%, e.g., 90 wt.%, of the particles would then pass a theoretical sieve size. The same applies to the methods known to a person skilled in the art for determining the D 90 value as have been said about the D 50 value.Advantageously, the additional particles are selected from the group consisting of polyurethane particles, polymethyl methacrylate particles, polymethyl urea particles, silicate acrylic resin polymer particles, polymeric microspheres, cellulose fibers, textile fibers, cork flour, and mixtures thereof. Preferably, these additional particles are polymethyl methacrylate particles, in particular cross-linked polymethyl methacrylate particles. These may have a refractive index of 1.47 to 1.51, preferably 1.48 to 1.50, and more preferably 1.487 to 1.492. The addition of particles with such particle sizes can improve the feel of surfaces treated with the aqueous coating according to the invention.

[0036] Furthermore, the aqueous composition may additionally contain at least one pigment. In particular, the aqueous coating material may additionally contain 0.1 to 10 wt.%, preferably 0.1 to 5 wt.%, more preferably 0.5 to 3 wt.%, at least one pigment, in each case based on the total weight of the composition.

[0037] Various substances can also be used as pigments. For example, only inorganic or only organic pigments, or mixtures of inorganic and organic pigments, can be used.

[0038] Preferably, the pigment is selected from the group consisting of titanium dioxide, iron oxide yellow, arylide (monoazo), bismuth vanadate, perinone, rutile tin zinc, quinacridone, diketo-pyrrolo-pyrrole, iron oxide red, phthalocyanine blue, dioxazine, cobalt blue, ultramarine blue, phthalocyanine green, chromium oxide green, cobalt green, carbon black, iron oxide black, pyrazolo-quinazolone, naphthol-AS monoazo pigment and mixtures thereof.

[0039] Examples of inorganic pigments that can be used include oxides such as titanium dioxide, iron oxides (e.g., PY 42, PR 101, P.Bk. 11), chromium oxide green (e.g., PG 17), mixed-phase pigments (e.g., cobalt oxides blue PB 28 and green PG 50), bismuth vanadate PY 184, rutile tin-zinc PO 216), silicates (e.g., ultramarine blue PB 29), and carbon (e.g., carbon black P.Bk. 7).

[0040] Examples of organic pigments that can be used include azo pigments, e.g., arylide yellow (monoazo) PY 74, polycyclic pigments, e.g., quinacridone PR 122, perinone PO 43, pyrazolo-quinazolone PO 67, diketo-pyrrolo-pyrrole (DPP) PR 254, dioxazines PV 23, and metal complex pigments, e.g., copper phthalocyanines blue PB 15:3 and green PG 7.

[0041] The names of the inorganic and organic pigments used for the examples correspond to the Generic Names of the Colour Index of the British Society of Dyers and Colourists.

[0042] By using pigments in the aqueous composition, colored aqueous coatings can be produced that essentially cover the entire color spectrum. This allows, in particular, the production of colored lacquers.

[0043] The aqueous compositions can also be pigment-free and therefore colorless. Colorless aqueous coating materials, particularly suitable as clear varnishes, can be produced using such aqueous compositions. Preferably, the aqueous composition according to the invention contains no pigment.

[0044] In addition, the aqueous composition according to the invention may also contain further conventional additives. In particular, the aqueous composition may additionally contain one or more further additives selected from the group consisting of defoamers, dispersants, wetting agents, preservatives, stabilizers, surface protectants, water repellents, substrate wetting agents, solvents and thickeners.

[0045] The additives and / or other substances may be present in pure form and / or as mixtures, especially with water.

[0046] Additives and / or other additives may be present in a total amount of 0.1 to 30 wt.%, preferably 0.5 to 20 wt.%, more preferably 1 to 10 wt.%, in each case based on the total weight of the aqueous composition.

[0047] Examples of thickeners include alcohol alkoxylates, ethylene oxide-propylene oxide copolymers, maleic anhydride-diisobutylene copolymers, polyacrylic and polymethacrylic acid and their salts, methylcelluloses, carboxymethylcelluloses, hydroxymethylcelluloses, polyurethanes, alkali metal phosphates and salts of modified phosphoric acids, as well as mixtures thereof.

[0048] Examples of defoamers include polyglycols, triglycerides, polysiloxane polyether copolymers, and silicone oils.

[0049] Examples of hydrophobic agents include oligomeric and polymeric siloxanes and silicone resins.

[0050] Examples of preservatives include isothiazolines.

[0051] Examples of wetting agents include polysiloxanes and acrylic copolymers.

[0052] Examples of solvents are monohydric or polyhydric alcohols.

[0053] Examples of substrate wetting agents are surfactants.

[0054] The invention further provides a method for producing the aqueous composition according to the invention, which comprises the following steps: a. Providing a composition containing, based on the total weight of the composition, i. 3 to 25 wt.% binder, ii. 5 to 25 wt.% crosslinking polymer, iii. 0.5 to 10 wt.% particles with an average particle size of 1 to 20 µm, iv. 0.01 to 2 wt.% of an alkaline component, v. 30 to 70 wt.% water, b. Dispersing the components mentioned in a.

[0055] The steps listed can be carried out in any order, but preferably they are carried out in the order given.

[0056] Devices known to those skilled in the art can be used to disperse the components. For example, turbomills, pearl mills, or dissolvers, preferably dissolvers, can be used for this purpose.

[0057] What has been said in connection with the aqueous composition of the binder according to the invention also applies equally to the binder of the process according to the invention.

[0058] What has been said in connection with the aqueous composition according to the invention for the crosslinking polymer also applies equally to the crosslinking polymer of the process according to the invention.

[0059] What has been said in connection with the aqueous composition according to the invention regarding the particles with a mean particle size of 1 to 20 µm also applies equally to the particles with a mean particle size of 1 to 20 µm of the process according to the invention.

[0060] What has been said in connection with the aqueous composition according to the invention regarding the alkaline component also applies equally to the alkaline component of the process according to the invention.

[0061] In particular, the composition of the process according to the invention may contain 5 to 20 wt.%, in particular 8 to 15 wt.% or 10 to 13 wt.%, binder and / or 8 to 22 wt.%, in particular 10 to 20 wt.% or 13 to 17 wt.%, crosslinking polymer and / or 1 to 8 wt.%, in particular 2 to 7 wt.% or 3 to 6 wt.%, particles with an average particle size of 1 to 20 µm and / or 0.01 to 1 wt.%, in particular 0.01 to 0.05 wt.%, of the alkaline component and / or additionally 0.1 to 5 wt.%, in particular 0.1 to 3 wt.% or 0.5 to 1.5 wt.%, matting agent, in each case based on the total weight of the composition.

[0062] Furthermore, the composition of the process according to the invention can also additionally contain 0.1 to 5 wt.%, preferably 0.1 to 3 wt.%, more preferably 0.5 to 2 wt.%, in each case based on the total weight of the composition, particles with a size of 1 to 50 µm, preferably 1 to 10 µm, and / or at least one pigment, in particular 0.1 to 10 wt.%, preferably 0.1 to 5 wt.%, more preferably 0.5 to 3 wt.%, in each case based on the total weight of the composition, at least one pigment and / or 0.1 to 30 wt.%, preferably 0.5 to 20 wt.%, more preferably 1 to 10 wt.%, particularly preferably 1.5 to 5 wt.%, in each case based on the total weight of the composition, additives and / or additives such as, for example, defoamers, dispersants, wetting agents, preservatives, stabilizers, surface protectants, hydrophobing agents, substrate wetting agents, solvents and thickeners.

[0063] Preferably, the composition of the process according to the invention does not contain a pigment.

[0064] What has been said in connection with the aqueous composition of the matting agent, the at least one pigment, the particles with a size of 1 to 50 µm and the further additives and / or admixtures also applies equally to the matting agent, the pigment, the particles and / or the additives and / or admixtures of the composition of the process according to the invention.

[0065] The invention further relates to an aqueous composition obtainable by the inventive method.

[0066] The invention further relates to a kit-of-parts comprising an aqueous composition according to the invention and a hardener.

[0067] In the kit-of-parts according to the invention, the aqueous composition and the hardener can be stored in separate containers. This separation of containers allows for a long shelf life in the kit-of-parts according to the invention. Nevertheless, by simply mixing the kit-of-parts, in particular using a paint mixing machine or by manual mixing, an aqueous coating material according to the invention can be obtained that can be given directly to users, yet still has a shelf life of up to two months.

[0068] Advantageously, the hardener has functional groups that can undergo a chemical reaction with the crosslinking polymer, in particular with the functional groups of the crosslinking polymer, thus effecting chemical crosslinking. Preferably, the hardener is not a catalyst.

[0069] Preferably, the hardener is an agent capable of forming an active ester with carboxyl groups. Preferably, the hardener is a carbodiimide, more preferably a polymeric carbodiimide. Suitable carbodiimides may, in particular, have functional carbodiimide groups (N=C=N). Carbodiimides may, in particular, be organic compounds with cumulated double bonds of the general structural formula RN=C=NR, wherein each R group may be independently selected from the group consisting of H, optionally a substituted hydrocarbon group with 1 to 20 carbon atoms, optionally substituted C1-C10 alkyl, acyl, aoryl, imidoyl, sulfonyl, nitrogen, silicon, and metal-substituted groups, in particular from the group consisting of H, optionally a substituted hydrocarbon group with 1 to 20 carbon atoms, optionally substituted C1-C10 alkyl, acyl, aoryl, imidoyl, and sulfonyl.Hydrocarbon residues and alkyl groups can also contain heteroatoms, preferably selected from nitrogen, oxygen, and sulfur, and / or be substituted with C1-C3 alkyl groups, hydroxyl groups, amino groups, and / or dimethylamino groups. Examples of carbodiimides are dicyclohexylcarbodiimide, diisopropylcarbodiimide, and 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide.

[0070] Polymeric carbodiimide preferably has at least one, and in particular two or more, functional carbodiimide groups (N=C=N). These can be present in the polymer backbone or as side chains. Polymeric carbodiimide is also advantageously non-ionic. Polymeric carbodiimide preferably has a carbodiimide equivalent weight of 200 to 800 g / mol, more preferably 200 to 700 g / mol, more preferably 200 to 600 g / mol, and most preferably 300 to 500 g / mol. Polymeric carbodiimide is preferably present as a dispersion in water or suitable solvent mixtures, in particular with a solids content of 20 to 100 wt.%, preferably 20 to 90 wt.%, further preferably 20 to 80 wt.%, further preferably 20 to 70 wt.%, further preferably 20 to 60 wt.%, further preferably 30 to 50 wt.%, particularly preferably 40 wt.%.

[0071] The carbodiimide group can be, in particular, the functional group that can undergo a chemical reaction with the crosslinking polymer.

[0072] The inventive kit-of-parts allows aqueous coating materials according to the invention to be obtained by mixing the components of the kit-of-parts. Preferably, the ratio of the inventive aqueous composition and hardener is selected such that for each mole of functional group, in particular each mole of carboxyl group, of the crosslinking polymer, there are two moles of functional groups of the hardener, in particular two moles of carbodiimide groups.

[0073] Accordingly, the invention provides an aqueous coating agent containing, in each case based on the total weight of the coating agent, a. 3 to 25 wt.% binder, b. 5 to 25 wt.% wetting polymer, c. 0.5 to 10 wt.% particles with an average particle size of 1 to 20 µm, d. 0.01 to 2 wt.% of an alkaline component, e. 0.5 to 5 wt.% hardener, f. 30 to 70 wt.% water.

[0074] The aqueous coating agent preferably has a pH value of 8 to 10.5, particularly 9 to 10. At this pH value, the aqueous coating agent exhibits high storage stability.

[0075] What has been said in connection with the aqueous composition according to the invention regarding the binder also applies equally to the binder of the aqueous coating material according to the invention.

[0076] What has been said in connection with the aqueous composition according to the invention for the crosslinking polymer also applies equally to the crosslinking polymer of the aqueous coating agent according to the invention.

[0077] What has been said in connection with the aqueous composition according to the invention regarding the particles with a mean particle size of 1 to 20 µm also applies equally to the particles with a mean particle size of 1 to 20 µm of the aqueous coating material according to the invention.

[0078] What has been said in connection with the aqueous composition according to the invention regarding the alkaline component also applies equally to the alkaline component of the aqueous coating material according to the invention.

[0079] In particular, the aqueous coating composition according to the invention may contain 5 to 20 wt.%, in particular 8 to 15 wt.% or 10 to 13 wt.%, binder and / or 8 to 22 wt.%, in particular 10 to 20 wt.% or 13 to 17 wt.%, wetting polymer and / or 1 to 8 wt.%, in particular 2 to 7 wt.% or 3 to 6 wt.%, particles with an average particle size of 1 to 20 µm and / or 0.01 to 1 wt.%, in particular 0.01 to 0.05 wt.%, of the alkaline component and / or 0.5 to 4 wt.%, in particular 1 to 2 wt.%, hardener and / or additionally 0.1 to 5 wt.%, in particular 0.1 to 3 wt.% or 0.5 to 1.5 wt.%, matting agent, in each case based on the total weight of the coating composition.

[0080] Furthermore, the aqueous coating composition according to the invention can also additionally contain 0.1 to 5 wt.%, preferably 0.1 to 3 wt.%, more preferably 0.5 to 2 wt.%, in each case based on the total weight of the coating composition, particles with a size of 1 to 50 µm, preferably 1 to 10 µm, and / or at least one pigment, in particular 0.1 to 10 wt.%, preferably 0.1 to 5 wt.%, more preferably 0.5 to 3 wt.%, in each case based on the total weight of the coating composition, at least one pigment and / or 0.1 to 30 wt.%, preferably 0.5 to 20 wt.%, more preferably 1 to 10 wt.%, particularly preferably 1.5 to 5 wt.%, in each case based on the total weight of the coating composition, additives and / or additives such as, for example, defoamers, dispersants, wetting agents, preservatives, stabilizers, surface protectants, hydrophobic agents, substrate wetting agents, Contains solvents and thickeners.

[0081] Preferably, the aqueous coating material according to the invention does not contain any pigment.

[0082] What has been said in connection with the aqueous composition of the matting agent, the at least one pigment, the particles with a size of 1 to 50 µm and the other additives and / or admixtures also applies equally to the matting agent, the pigment, the particles and / or the additives and / or admixtures of the aqueous coating agent.

[0083] What has been said in connection with the kit-of-parts for the hardener also applies equally to the hardener of the aqueous coating material according to the invention.

[0084] The aqueous coating agent is suitable for various uses. In particular, it is suitable as a paint, especially as a one-component paint. Accordingly, the use of the aqueous coating agent according to the invention as a paint, especially for interior and / or exterior use, is also part of the invention.

[0085] The invention is explained in more detail below by means of examples, which, however, serve only for illustration and are not limiting. EXAMPLE

[0086] An aqueous composition A with the following formulation shown in Table 1 was prepared by mixing the components listed in Table 1, the amounts given in wt.%. A Table 1: Recipe of the aqueous composition ingredient Quantity (wt.%) Polyurethane dispersion for soft-feel effects, as a 35% aqueous dispersion 20 Aliphatic anionic polyurethane dispersion, as a 40% aqueous dispersion 37 Anionic aliphatic polyester polyurethane dispersion, as a 40% aqueous dispersion 13 Defoamer, 20% in water 2 Wetting agent 1 Matting agent 0,7 Particles with an average particle size of 6 to 10 µm 4 Particles with a particle size D 90 of 6 µm 1 Thickener, 25% in water 3 solvent 7 Dispersing agent 1,5 Alkaline component, 15% in water 0,2 Water 9,6

[0087] A composition with the formulation specified in Table 1 was dispersed using a dissolver, resulting in the aqueous composition A was received.

[0088] The aqueous composition A was supplied as a kit-of-parts in conjunction with a polymeric carbodiimide, which was available as a 40 wt% aqueous dispersion, where the carbodiimide equivalent weight was 393 g / mol, as a hardener.

[0089] By manually mixing 19 parts by weight of the aqueous composition AA water-based coating was obtained using one part by weight of the polymeric carbodiimide, which could be supplied to users as a one-component (1K) paint system. This paint could be stored in a container for two months without hardening. It was used indoors and outdoors on metal, wood, plastics, existing coatings, and suitable primers. The paint adhered well to the surfaces, cured within one to four hours, and exhibited good mechanical and chemical resistance, particularly to water and household chemicals. The coating also had a pleasant feel to the touch.

[0090] The items described in the following points represent further embodiments of the invention: 1. Aqueous composition containing, based on the total weight of the composition, a. 3 to 25 wt.% binder, b. 5 to 25 wt.% crosslinking polymer, c. 0.5 to 10 wt.% particles with a mean particle size of 1 to 20 µm, d. 0.01 to 2 wt.% of an alkaline component, e. 30 to 70 wt.% water. 2. Aqueous composition according to point 1, characterized by the fact that The coating material contains 5 to 20 wt.%, in particular 8 to 15 wt.% or 10 to 13 wt.%, binder, in each case based on the total weight of the composition. 3. Aqueous composition according to one of points 1 or 2, characterized by the fact thatThe binder is a polymer, in particular selected from the group consisting of polyurethanes, polyester polyurethanes, anionic polyester polyurethanes, aliphatic anionic polyester polyurethanes, polycarbonate ester polyurethanes, polyether polyols, polyacrylate dispersions, alkyd emulsions, as well as their hydroxy-functional polymers and mixtures thereof. 4. Aqueous composition according to any of the preceding points, characterized by the fact that The binder is in the form of an aqueous dispersion or as a mixture of two aqueous binder dispersions, each with a solids content of 25 to 60 wt.%, in particular 30 to 50 wt.% or 35 to 40 wt.%. 5. Aqueous composition according to one of the preceding points, characterized by the fact that The composition contains 8 to 22 wt.%, in particular 10 to 20 wt.% or 13 to 17 wt.%, of the crosslinking polymer, in each case based on the total weight of the composition. 6. Aqueous composition according to any of the preceding points, characterized by the fact thatThe crosslinking polymer has at least one carboxyl group and / or at least one hydroxyl group and / or at least one amino group, in particular at least one carboxyl group, and / or is selected from the group consisting of anionic polyurethanes, aliphatic anionic polyurethanes, acrylic-containing polymers, polyurethane-acrylate emulsions, polyurethane-alkyd emulsions, polyurethanes, polyester polyurethanes, anionic polyester polyurethanes, aliphatic anionic polyester polyurethanes, polycarbonate ester polyurethanes, polyether polyols, polyacrylate dispersions, alkyd emulsions, as well as their hydroxy-functional polymers and mixtures thereof. 7. Aqueous composition according to any of the above points, characterized by the fact thatThe composition contains 1 to 8 wt.%, in particular 2 to 7 wt.% or 3 to 6 wt.%, particles with a mean particle size of 1 to 20 µm, in each case based on the total weight of the composition. 8. Aqueous composition according to any of the preceding points, characterized by the fact that The particles have a mean particle size of 1 to 20 µm, a mean particle size of 2 to 17 µm, in particular 3 to 15 µm, 4 to 13 µm, or 6 to 10 µm, and / or are selected from the group consisting of polyurethane particles, polymethyl methacrylate particles, polymethyl urea particles, silicate acrylic resin polymer particles, polymeric microspheres, cellulose fibers, textile fibers, cork flour, and mixtures thereof, in particular silicate acrylic resin polymer particles. 9. Aqueous composition according to any of the preceding points, characterized by the fact thatthe composition contains 0.01 to 1 wt.%, in particular 0.01 to 0.05 wt.% of the alkaline component, in each case based on the total weight of the composition, and / or that the alkaline component is selected from the group consisting of potassium hydroxide, sodium hydroxide, calcium hydroxide, ammonia, triethylamine, dimethylaminoethanol, aminomethylpropanol, dimethylglucamine and mixtures thereof, and / or that the alkaline component in its pure state is a water-soluble gas, and / or that the alkaline component is in the form of an aqueous solution, in particular ammonium chloride. 10. Aqueous composition according to any of the foregoing points, characterized by the fact that The composition additionally contains 0.1 to 5 wt.%, in particular 0.1 to 3 wt.% or 0.5 to 1.5 wt.%, matting agent, in each case based on the total weight of the composition. 11. Aqueous composition according to point 10, characterized by the fact thatThe matting agent is selected from the group consisting of pyrogenic silica, polymethyl urea, ceramic microspheres, diatomaceous earth, quartz flour, talc, and wax additives such as polyethylene waxes, and / or has a mean particle size, in particular a D50 value, of 1 to 20 µm, in particular 5 to 15 µm, in particular 7 to 13 µm, in particular 8 to 12 µm, in particular 9 to 11 µm. 12. Aqueous composition according to any of the preceding points, characterized by the fact that The composition additionally contains at least one pigment. 13. Aqueous composition according to one of the preceding points, characterized by the fact thatThe composition additionally contains one or more further additives and / or admixtures selected from the group consisting of defoamers, dispersants, wetting agents, preservatives, stabilizers, surface protectants, water repellents, substrate wetting agents, solvents, and thickeners. 14. Method for preparing an aqueous composition according to any one of points 1 to 13, comprising the steps: a. Providing a composition containing, in each case based on the total weight of the composition, i. 3 to 25 wt.% binder, ii. 5 to 25 wt.% crosslinking polymer, iii. 0.5 to 10 wt.% particles with a mean particle size of 1 to 20 µm, iv. 0.01 to 2 wt.% of an alkaline component, v. 30 to 70 wt.% water, b. Dispersing the components mentioned in a. 15. Method according to point 14, characterized by the fact thatThe composition contains 5 to 20 wt.%, in particular 8 to 15 wt.% or 10 to 13 wt.%, binder and / or 8 to 22 wt.%, in particular 10 to 20 wt.% or 13 to 17 wt.%, crosslinking polymer and / or 1 to 8 wt.%, in particular 2 to 7 wt.% or 3 to 6 wt.%, particles with a mean particle size of 1 to 20 µm and / or 0.01 to 1 wt.%, in particular 0.01 to 0.05 wt.%, of the alkaline component and / or additionally 0.1 to 5 wt.%, in particular 0.1 to 3 wt.% or 0.5 to 1.5 wt.%, matting agent, in each case based on the total weight of the composition. 16. Method according to one of points 14 or 15, characterized by the fact thatthe binder according to one of points 3 or 4 and / or the crosslinking polymer according to point 6 and / or the particles with a mean particle size of 1 to 20 µm according to point 8 and / or the alkaline component according to point 9 and / or the optional matting agent according to point 11 and / or the composition additionally contains at least one pigment and / or one or more additives selected from the group consisting of defoamers, dispersants, wetting agents, preservatives, stabilizers, surface protectants, water repellents, substrate wetting agents, solvents and thickeners. 17. Aqueous composition obtainable by a process according to one of points 14 to 16. 18. Kit-of-parts comprising an aqueous composition according to one of points 1 to 13 or 17 and a hardener. 19. Kit-of-parts according to point 18, characterized by the fact thatThe hardener is an agent capable of forming an active ester with carboxyl groups, in particular carbodiimide, especially polymeric carbodiimide. 20. Aqueous coating composition containing, in each case based on the total weight of the coating composition, a. 3 to 25 wt.% binder, b. 5 to 25 wt.% crosslinking polymer, c. 0.5 to 10 wt.% particles with an average particle size of 1 to 20 µm, d. 0.01 to 2 wt.% an alkaline component, e. 0.5 to 5 wt.% hardener, f. 30 to 70 wt.% water. 21. Aqueous coating composition according to item 20, characterized by the fact thatThe coating material contains 5 to 20 wt.%, in particular 8 to 15 wt.% or 10 to 13 wt.%, binder and / or 8 to 22 wt.%, in particular 10 to 20 wt.% or 13 to 17 wt.%, crosslinking polymer and / or 1 to 8 wt.%, in particular 2 to 7 wt.% or 3 to 6 wt.%, particles with an average particle size of 1 to 20 µm and / or 0.01 to 1 wt.%, in particular 0.01 to 0.05 wt.%, of the alkaline component and / or 0.5 to 4 wt.%, in particular 1 to 2 wt.%, hardener and / or additionally 0.1 to 5 wt.%, in particular 0.1 to 3 wt.% or 0.5 to 1.5 wt.%, matting agent, in each case based on the total weight of the coating material. 22. Aqueous coating material according to point 20 or 21, characterized by the fact thatThe binder is defined according to one of points 3 or 4 and / or the crosslinking polymer according to point 6 and / or the particles with a mean particle size of 1 to 20 µm according to point 8 and / or the alkaline component according to point 9 and / or the optional matting agent according to point 11 and / or the hardener according to point 19 and / or the composition additionally contains at least one pigment and / or one or more additives selected from the group consisting of defoamers, dispersants, wetting agents, preservatives, stabilizers, surface protectants, water repellents, substrate wetting agents, solvents and thickeners. 23. Use of an aqueous coating material according to one of points 20 to 22 as a paint, in particular for interior and / or exterior use.

Claims

1. Aqueous composition containing, based on the total weight of the composition, a. 3 to 25 wt.% binder, b. 5 to 25 wt.% crosslinking polymer, c. 0.5 to 10 wt.% particles with an average particle size of 1 to 20 µm, d. 0.01 to 2 wt.% of an alkaline component, e. 30 to 70 wt.% water.

2. Aqueous composition according to claim 1, characterized by the fact thatThe coating material contains 5 to 20 wt.%, in particular 8 to 15 wt.% or 10 to 13 wt.%, binder, in each case based on the total weight of the composition; and / or that the binder is a polymer, in particular selected from the group consisting of polyurethanes, polyester polyurethanes, anionic polyester polyurethanes, aliphatic anionic polyester polyurethanes, polycarbonate ester polyurethanes, polyether polyols, polyacrylate dispersions, alkyd emulsions, as well as their hydroxy-functional polymers and mixtures thereof; and / or that the binder is in the form of an aqueous dispersion or as a mixture of two aqueous binder dispersions, each with a solids content of 25 to 60 wt.%, in particular 30 to 50 wt.% or 35 to 40 wt.%.

3. Aqueous composition according to any one of the preceding claims, characterized by the fact thatthe composition contains 8 to 22 wt.%, in particular 10 to 20 wt.% or 13 to 17 wt.%, of the crosslinking polymer, in each case based on the total weight of the composition; and / or that the crosslinking polymer has at least one carboxyl group and / or at least one hydroxyl group and / or at least one amino group, in particular at least one carboxyl group, and / or is selected from the group consisting of anionic polyurethanes, aliphatic anionic polyurethanes, acrylic-containing polymers, polyurethane-acrylate emulsions, polyurethane-alkyd emulsions, polyurethanes, polyester polyurethanes, anionic polyester polyurethanes, aliphatic anionic polyester polyurethanes, polycarbonate ester polyurethanes, polyether polyols, polyacrylate dispersions, alkyd emulsions, as well as their hydroxy-functional polymers and mixtures thereof.

4. Aqueous composition according to any one of the preceding claims, characterized by the fact thatthe composition contains 1 to 8 wt.%, in particular 2 to 7 wt.% or 3 to 6 wt.%, particles with an average particle size of 1 to 20 µm, in each case based on the total weight of the composition; and / or that the particles with an average particle size of 1 to 20 µm have an average particle size of 2 to 17 µm, in particular 3 to 15 µm or 4 to 13 µm or 6 to 10 µm and / or are selected from the group consisting of polyurethane particles, polymethyl methacrylate particles, polymethyl urea particles, silicate acrylic resin polymer particles, polymeric microspheres, cellulose fibers, textile fibers, cork flour and mixtures thereof, in particular silicate acrylic resin polymer particles.

5. Aqueous composition according to any one of the preceding claims, characterized by the fact thatthe composition contains 0.01 to 1 wt.%, in particular 0.01 to 0.05 wt.% of the alkaline component, in each case based on the total weight of the composition, and / or that the alkaline component is selected from the group consisting of potassium hydroxide, sodium hydroxide, calcium hydroxide, ammonia, triethylamine, dimethylaminoethanol, aminomethylpropanol, dimethylglucamine and mixtures thereof, and / or that the alkaline component in its pure state is a water-soluble gas, and / or that the alkaline component is in the form of an aqueous solution, in particular ammonium chloride.

6. Aqueous composition according to any one of the preceding claims, characterized by the fact thatThe composition additionally contains 0.1 to 5 wt.%, in particular 0.1 to 3 wt.% or 0.5 to 1.5 wt.%, matting agent, in each case based on the total weight of the composition, wherein the matting agent is optionally selected from the group consisting of pyrogenic silica, polymethyl urea, ceramic microspheres, diatomaceous earth, quartz flours, talc and wax additives such as polyethylene waxes and / or a medium particle size, in particular a D 50 -value, from 1 to 20 µm, in particular from 5 to 15 µm, in particular from 7 to 13 µm, in particular from 8 to 12 µm, in particular from 9 to 11 µm.

7. Aqueous composition according to any one of the preceding claims, characterized by the fact thatthe composition additionally contains at least one pigment; and / or that the composition additionally contains one or more further additives selected from the group consisting of defoamers, dispersants, wetting agents, preservatives, stabilizers, surface protectants, hydrophobic agents, substrate wetting agents, solvents and thickeners.

8. A method for producing an aqueous composition according to any one of claims 1 to 7, comprising the steps: a. Providing a composition containing, based on the total weight of the composition, i. 3 to 25 wt.% binder, ii. 5 to 25 wt.% crosslinking polymer, iii. 0.5 to 10 wt.% particles with an average particle size of 1 to 20 µm, iv. 0.01 to 2 wt.% of an alkaline component, v. 30 to 70 wt.% water, b. Dispersing the components mentioned in a.

9. Method according to claim 8, characterized by the fact thatThe composition contains 5 to 20 wt.%, in particular 8 to 15 wt.% or 10 to 13 wt.%, binder and / or 8 to 22 wt.%, in particular 10 to 20 wt.% or 13 to 17 wt.%, crosslinking polymer and / or 1 to 8 wt.%, in particular 2 to 7 wt.% or 3 to 6 wt.%, particles with an average particle size of 1 to 20 µm and / or 0.01 to 1 wt.%, in particular 0.01 to 0.05 wt.%, of the alkaline component and / or additionally 0.1 to 5 wt.%, in particular 0.1 to 3 wt.% or 0.5 to 1.5 wt.%, matting agent, in each case based on the total weight of the composition.

10. Method according to one of claims 8 or 9, characterized by the fact thatthe binder according to claim 2 and / or the crosslinking polymer according to claim 3 and / or the particles with a mean particle size of 1 to 20 µm according to claim 4 and / or the alkaline component according to claim 5 and / or the optional matting agent according to claim 6 is defined and / or the composition additionally contains at least one pigment and / or one or more additives selected from the group consisting of defoamers, dispersants, wetting agents, preservatives, stabilizers, surface protectants, hydrophobizing agents, substrate wetting agents, solvents and thickeners.

11. Aqueous composition obtainable by a method according to any one of claims 8 to 10.

12. Kit-of-parts comprising an aqueous composition according to any one of claims 1 to 7 or 11 and a hardener, wherein the hardener is optionally an agent capable of forming an active ester with carboxyl groups, in particular carbodiimide, in particular polymeric carbodiimide.

13. Aqueous coating material containing, based on the total weight of the coating material, a. 3 to 25 wt.% binder, b. 5 to 25 wt.% crosslinking polymer, c. 0.5 to 10 wt.% particles with an average particle size of 1 to 20 µm, d. 0.01 to 2 wt.% of an alkaline component, e. 0.5 to 5 wt.% hardener, f. 30 to 70 wt.% water.

14. Aqueous coating composition according to claim 13, characterized by the fact thatthe coating agent 5 to 20 wt.%, in particular 8 to 15 wt.% or 10 to 13 wt.%, binder and / or 8 to 22 wt.%, in particular 10 to 20 wt.% or 13 to 17 wt.%, crosslinking polymer and / or 1 to 8 wt.%, in particular 2 to 7 wt.% or 3 to 6 wt.%, particles with an average particle size of 1 to 20 µm and / or 0.01 to 1 wt.%, in particular 0.01 to 0.05 wt.%, of the alkaline component and / or 0.5 to 4 wt.%, in particular 1 to 2 wt.% hardener and / or additionally 0.1 to 5 wt.%, in particular 0.1 to 3 wt.% or 0.5 to 1.5 wt.%.-%, matting agent, each based on the total weight of the coating material; and / or the binder according to claim 2 and / or the crosslinking polymer according to claim 3 and / or the particles with a mean particle size of 1 to 20 µm according to claim 4 and / or the alkaline component according to claim 5 and / or the optional matting agent according to claim 6 and / or the hardener according to claim 12 and / or the composition is defined as additionally comprising at least one pigment and / or one or more additives selected from the group consisting of defoamers, dispersants, wetting agents, preservatives, stabilizers, surface protectants, hydrophobizing agents, substrate wetting agents, solvents and thickeners.

15. Use of an aqueous coating agent according to one of claims 13 or 14 as a paint, particularly in indoor and / or outdoor areas.

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